import * as React from "react";
import { Slot } from "@radix-ui/react-slot";
import { cva, type VariantProps } from "class-variance-authority";
import { Loader2 } from "lucide-react";

import { cn } from "@/lib/utils";

const buttonVariants = cva(
  "inline-flex items-center justify-center whitespace-nowrap rounded-md text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground hover:bg-primary/90",
        destructive: "bg-destructive text-destructive-foreground hover:bg-destructive/90",
        outline: "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
        secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
        ghost: "hover:bg-accent hover:text-accent-foreground",
        link: "text-primary underline-offset-4 hover:underline",
      },
      size: {
        default: "h-10 px-4 py-2",
        sm: "h-9 rounded-md px-3",
        lg: "h-11 rounded-md px-8",
        icon: "h-10 w-10",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  }
);

export interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement>, VariantProps<typeof buttonVariants> {
  asChild?: boolean;
  loading?: boolean;
}

const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(({ className, variant, size, loading, asChild = false, children, ...props }, ref) => {
  if (asChild) {
    return (
      <Slot ref={ref} {...props}>
        <>
          {React.Children.map(children as React.ReactElement, (child: React.ReactElement) => {
            return React.cloneElement(child, {
              className: cn(buttonVariants({ variant, size }), className),
              children: (
                <>
                  {loading && <Loader2 className={cn("h-4 w-4 animate-spin", children && "mr-2")} />}
                  {child.props.children}
                </>
              ),
            });
          })}
        </>
      </Slot>
    );
  }

  return (
    <button className={cn(buttonVariants({ variant, size, className }))} disabled={loading} ref={ref} {...props}>
      <>
        {loading && <Loader2 className={cn("h-4 w-4 animate-spin", children && "mr-2")} />}
        {children}
      </>
    </button>
  );
});
Button.displayName = "Button";

export { Button, buttonVariants };
